21831880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{757}}^1$

素因数の和:878

約数の個数: 64

約数和(自身を含む): 56759040

約数和(自身を除く): 34927160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 103, 140, 206, 280, 412, 515, 721, 757, 824, 1030, 1442, 1514, 2060, 2884, 3028, 3605, 3785, 4120, 5299, 5768, 6056, 7210, 7570, 10598, 14420, 15140, 21196, 26495, 28840, 30280, 42392, 52990, 77971, 105980, 155942, 211960, 311884, 389855, 545797, 623768, 779710, 1091594, 1559420, 2183188, 2728985, 3118840, 4366376, 5457970, 10915940, 21831880]

約数ペア:

[(1, 21831880), (2, 10915940), (4, 5457970), (5, 4366376), (7, 3118840), (8, 2728985), (10, 2183188), (14, 1559420), (20, 1091594), (28, 779710), (35, 623768), (40, 545797), (56, 389855), (70, 311884), (103, 211960), (140, 155942), (206, 105980), (280, 77971), (412, 52990), (515, 42392), (721, 30280), (757, 28840), (824, 26495), (1030, 21196), (1442, 15140), (1514, 14420), (2060, 10598), (2884, 7570), (3028, 7210), (3605, 6056), (3785, 5768), (4120, 5299)]